He is 13 and he wears a Tandem X2 w/Dexcom G6 (soon to be G7?). It certainly makes life easier, but like you said there's constant mental overhead. We have SugarPixels all over the house, etc. His pump beeps at him so often he's just become accustomed to it and ignores it until he starts feeling bad (typically when he's going low). But that also means that it limits his ability to do things, he's got only a handful of friends that we trust leaving him alone at their home because their parents are willing to keep checking on him, etc.